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ctamixer.h

/**
 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 *
 * This source file is released under GPL v2 license (no other versions).
 * See the COPYING file included in the main directory of this source
 * distribution for the license terms and conditions.
 *
 * @File    ctamixer.h
 *
 * @Brief
 * This file contains the definition of the Audio Mixer
 * resource management object.
 *
 * @Author  Liu Chun
 * @Date    May 21 2008
 *
 */

#ifndef CTAMIXER_H
#define CTAMIXER_H

#include "ctresource.h"
#include <linux/spinlock.h>

/* Define the descriptor of a summation node resource */
00026 struct sum {
      struct rsc rsc;         /* Basic resource info */
      unsigned char idx[8];
};

/* Define sum resource request description info */
struct sum_desc {
      unsigned int msr;
};

struct sum_mgr {
      struct rsc_mgr mgr;     /* Basic resource manager info */
      spinlock_t mgr_lock;

       /* request one sum resource */
      int (*get_sum)(struct sum_mgr *mgr,
                  const struct sum_desc *desc, struct sum **rsum);
      /* return one sum resource */
      int (*put_sum)(struct sum_mgr *mgr, struct sum *sum);
};

/* Constructor and destructor of daio resource manager */
int sum_mgr_create(void *hw, struct sum_mgr **rsum_mgr);
int sum_mgr_destroy(struct sum_mgr *sum_mgr);

/* Define the descriptor of a amixer resource */
struct amixer_rsc_ops;

struct amixer {
      struct rsc rsc;         /* Basic resource info */
      unsigned char idx[8];
      struct rsc *input;      /* pointer to a resource acting as source */
      struct sum *sum;  /* Put amixer output to this summation node */
      struct amixer_rsc_ops *ops;   /* AMixer specific operations */
};

struct amixer_rsc_ops {
      int (*set_input)(struct amixer *amixer, struct rsc *rsc);
      int (*set_scale)(struct amixer *amixer, unsigned int scale);
      int (*set_invalid_squash)(struct amixer *amixer, unsigned int iv);
      int (*set_sum)(struct amixer *amixer, struct sum *sum);
      int (*commit_write)(struct amixer *amixer);
      /* Only for interleaved recording */
      int (*commit_raw_write)(struct amixer *amixer);
      int (*setup)(struct amixer *amixer, struct rsc *input,
                  unsigned int scale, struct sum *sum);
      int (*get_scale)(struct amixer *amixer);
};

/* Define amixer resource request description info */
struct amixer_desc {
      unsigned int msr;
};

struct amixer_mgr {
      struct rsc_mgr mgr;     /* Basic resource manager info */
      spinlock_t mgr_lock;

       /* request one amixer resource */
      int (*get_amixer)(struct amixer_mgr *mgr,
                    const struct amixer_desc *desc,
                    struct amixer **ramixer);
      /* return one amixer resource */
      int (*put_amixer)(struct amixer_mgr *mgr, struct amixer *amixer);
};

/* Constructor and destructor of amixer resource manager */
int amixer_mgr_create(void *hw, struct amixer_mgr **ramixer_mgr);
int amixer_mgr_destroy(struct amixer_mgr *amixer_mgr);

#endif /* CTAMIXER_H */

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